Re: USB-storage/SCSI panic/error writing CF card

[Patrick Mansfield <patmans@us.ibm.com>]

On Thu, Jan 09, 2003 at 01:36:14PM -0500, Murray J. Root wrote:

> Writing to the card sometimes hangs the process when unmounting 
> 
> Sometimes the data IS written to the card first, then it hangs the process.
> 
> Sometimes the card is corrupt (cannot cd to the mountpoint -I/O error)
>   /var/log/messages has several lines like:
>   Jan  9 13:08:51 Master kernel: FAT: Filesystem panic (dev sd(8,1))
>   Jan  9 13:08:51 Master kernel:     Directory 4: invalid cluster chain
>   
> Sometimes get kernel panic with ONLY these 2 lines:
>   "Error handler thread not present at f7a57000 f7bf0d80 drivers/scsi/scsi-error.c 154"
>   "In interrupt handler - not syncing"
>   No messages in logs

The panic is caused by timeout on a scsi command when the error handler
has unexpectedly gone away, possibly because of this bug, where the erorr
handler exits early because of a SIGHUP:

http://marc.theaimsgroup.com/?l=linux-scsi&m=104145526331820&w=2

Fixing the panic won't fix the corruption. scsi should really offline the
adapter and scsi devices on the adapter rather than panic.

-- Patrick Mansfield